Well it doesn't sound like my wife's version is "swedish enough" for you, but I'll post it here anyways. It's easy, and I find it delicious. As for lingonberries, they are overrated. I've had lingonberry juice, and it tasted like cranberry juice to me!
Swedish Meatballs
2 eggs
1/2 c. milk
2 Tbsp. prepared mustard
2 Tbsp. parsley flakes
1/2 tsp. marjoram
1/2 tsp. seasoned salt, or regular salt
1/4 tsp. pepper
1/4 tsp. nutmeg
1/2 tsp. grated lemon rind (the secret ingredient to make these fabulous)
2 Tbsp. finely chopped onion
1 1/2 c. ground meat
3 slices of crumbled bread
Mix all ingredients and make balls. Brown meatballs in a little butter.
Transfer meatballs to a 2 qt. shallow casserole with a cover.
In browning pan, add enough butter to from a paste mixed with 2 Tbsp. flour. Cook 1 min.
Stir in: 1 can condensed cream of mushroom soup
1 Tbsp. Worcestershire sauce
1/2 c. milk
Remove from heat, and add 1/2 sour cream. Pour over meatballs in casserole dish.
Bake at 350 degrees for 30 mins. Serve with noodles.